Ok, I'm not sure where the problem is, but I'm thinking hardware, so I'm posting this here.

I have hooked up an antenna to my Dish box and can get WDAM clearly in HD. In my Vista Media Center box, I try to watch the same channel, and it tells me there is no signal. Now, when I go into the signal strength screen, its full green all the way across, so I know its not signal strength. Anybody have an idea why I wouldn't be able to get the channel via my Media Center box?

Oh, in case it matters, I'm using a WinTV-HVR 1600 for my antenna tuner.

I don't know anything about your PC tuner card, but if you are getting a strong signal, my thought is that WDAM has a problem with its PSIP info, probably involving remapping the channel, that the Dish tuner can decode but your PC tuner card cannot. I have that problem locally with a channel that transmits on channel 11 but does not remap properly to channel 39. Some of my tuners can tune the transmit channel directly, others cannot lock the signal without remapping info.

You could check your local reception thread to see if others are having problems with the station or contact WDAM's engineers.